Specify Go 1.21 in go.mod and Dockerfile

Dockerfile

@@ -1,5 +1,23 @@
+#
+# Copyright 2021-2024 Hewlett Packard Enterprise Development LP
+# Other additional copyright holders may be indicated within.
+#
+# The entirety of this work is licensed under the Apache License,
+# Version 2.0 (the "License"); you may not use this file except
+# in compliance with the License.
+#
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
 # Builder stage for compiling go source code
-FROM golang:1.19 as builder
+FROM golang:1.21 as builder
 
 WORKDIR /workspace
 
@@ -31,4 +49,4 @@ COPY --from=builder /workspace/lustre-csi-driver .
 # See mount.lustre description in sbin/README.md
 COPY sbin/mount.lustre-cray /sbin/mount.lustre
 
-ENTRYPOINT ["/lustre-csi-driver"]
+ENTRYPOINT ["/lustre-csi-driver"]

go.mod

@@ -1,6 +1,6 @@
 module github.com/HewlettPackard/lustre-csi-driver
 
-go 1.19
+go 1.21
 
 require (
 	github.com/container-storage-interface/spec v1.5.0